Materials:
Six colours required to form rainbow in proportions:
250 (275, 300) g main colour/violet and,
75 (75, 100) grams each of 5 contrast colours/ pink, orange, yellow, green & blue.

Treble ribbing forms the cuff and welts.

A vertical band of reversed treble stitches (as for the ribbing) forms the textured interest on the body of the jumper.